Testing tool for eccentric packer

Abstract

The invention discloses a test tool for an eccentric packer, and solves the technical problem of serious eccentricity between the test tool and the packer. The testing tool comprises a packer setting sleeve pipe, a packer setting sleeve pipe and a packer setting sleeve pipe, the upper seal examining shell is coaxially connected to the top of the packer setting sleeve; the central pipe is coaxially connected to the top of the upper seal examining shell, and the bottom of the central pipe extends into the upper seal examining shell; one end of the upper eccentric adapter is coaxially connected with the central pipe, and the other end is eccentrically connected with an oil pipe at the top of the packer; the lower seal examining shell is coaxially connected to the bottom of the packer setting sleeve; the plugging part is coaxially connected to the bottom of the lower sealing examining shell; and one end of the lower eccentric adapter is coaxially connected with the plugging part, and the other end is eccentrically connected with an oil pipe at the bottom of the packer. According to the invention, the integral concentric design of the test tool and the packer can be realized, the problem of center-of-gravity shift is effectively improved, and the test efficiency and test safety of the eccentric packer are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of oil production tools, and in particular relates to a testing tool for an eccentric packer. Background Art

[0002] At present, offshore oilfield exploitation processes are diverse, such as electric submersible pump completion and dual-tube completion. In order to meet process requirements, production packers usually have various structures. Among them, cable packers and dual-tube packers usually have main and secondary pipelines due to the need to cross cables. The main pipeline is used for production and has a larger aperture; the secondary pipeline is used for crossing and has a smaller aperture. The overall structure is eccentric.

[0003] However, when testing eccentric packers, concentric tooling cannot be used like conventional production packers. If eccentric tooling is designed, it will lead to overall mass imbalance, inconvenience in handling and safety hazards, which needs to be improved. Summary of the Invention

[0004] In order to solve all or part of the above problems, the purpose of the present invention is to provide a test fixture for eccentric type packers, which can realize the overall concentric design of the test fixture and the packer, effectively improve the problem of center of gravity offset, and at the same time have functions such as temperature monitoring, tensile and compression testing, and unsealing testing, thereby improving the testing efficiency and testing safety of eccentric type packers.

[0005] The present invention provides a testing tool for an eccentric packer, comprising:

[0006] Packer setting casing, for the packer to be sealed and installed inside it;

[0007] An upper test casing coaxially connected to the top of the packer setting casing;

[0008] a central tube coaxially connected to the top of the upper enclosure, with the bottom of the central tube extending into the upper enclosure;

[0009] An upper eccentric conversion joint, one end of which is coaxially connected to the central pipe and the other end of which is eccentrically connected to the oil pipe at the top of the packer;

[0010] A lower test casing, coaxially connected to the bottom of the packer setting casing;

[0011] A sealing portion coaxially connected to the bottom of the lower test shell;

[0012] A lower eccentric conversion joint has one end coaxially connected to the plugging portion and the other end eccentrically connected to the oil pipe at the bottom of the packer.

[0013] Optionally, the upper eccentric conversion joint and the lower eccentric conversion joint respectively include a joint body, a connecting hole and a transfer hole, and the connecting hole is connected to the corresponding transfer hole, the connecting hole is coaxially arranged with the joint body, and is used to be coaxially connected to the center pipe or the sealing part, and the transfer hole is eccentrically arranged with the joint body, and is used to be eccentrically connected to the corresponding oil pipe of the isolation device.

[0014] Optionally, the connecting hole and the adapter hole are respectively configured as threaded holes and are threadedly connected to corresponding components.

[0015] Optionally, the central tube includes an upper branch tube, a connecting tube and a lower branch tube coaxially connected from top to bottom, the bottom of the upper branch tube, the connecting tube and the lower branch tube are respectively located in the upper test shell, the upper branch tube is connected to the upper test shell through an upper sealing joint, and the lower branch tube is connected to the upper eccentric conversion joint.

[0016] Optionally, the top of the upper branch pipe is connected to a push-pull joint, the bottom of the push-pull joint is provided with an upper pressure channel hole connected to the upper branch pipe, and the push-pull joint is provided with an upper sealing pressure interface connected to the upper pressure channel hole.

[0017] Optionally, the push-pull joint is configured as a hinge joint structure and is used for being hingedly fixed to an external drawing machine.

[0018] Optionally, the sealing part includes a sealing tube and a sealing head, the top of the sealing tube extends into the sealing casing of the packer and is connected to the lower eccentric conversion joint, the sealing tube is connected to the lower sealing shell through a lower sealing joint, and the sealing head is connected to the bottom of the sealing tube.

[0019] Optionally, a lower pressure channel hole communicating with the plugging tube is provided on the top of the sealing head, and a lower sealing pressure interface communicating with the lower pressure channel hole is provided on the plugging head.

[0020] Optionally, mounting holes are respectively provided on the upper test shell and the lower test shell, and the two mounting holes are respectively used to install temperature monitoring sensors.

[0021] Optionally, a sealing inspection interface is provided on the upper sealing inspection shell and the lower sealing inspection shell respectively.

[0022] As can be seen from the above technical solution, the test fixture for eccentric packers provided by the present invention has the following advantages:

[0023] The test fixture can realize the overall concentric design of the test fixture and the packer, effectively improving the problem of center of gravity offset. At the same time, it has functions such as temperature monitoring, tension and compression testing, and unsealing testing, thereby improving the testing efficiency and safety of eccentric packers.

[0024] Other features and advantages of the present invention will be set forth in the description that follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation to the technical solution of the present invention.

[0026] Figure 1 is a cross-sectional view of an embodiment of the present invention;

[0027] Figure 2 This is a cross-sectional view of an embodiment of the present invention, showing the upper half of the test fixture;

[0028] Figure 3 This is a cross-sectional view of an embodiment of the present invention, showing the lower half of the test fixture;

[0029] Figure 4 A cross-sectional view of an upper eccentric conversion joint or a lower eccentric conversion joint in an embodiment of the present invention;

[0030] Figure 5 3-D view of a push-pull joint in an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Packer setting casing; 2. Upper test shell; 3. Center pipe; 31. Upper branch pipe; 32. Connecting pipe; 33. Lower branch pipe; 4. Upper eccentric conversion joint; 5. Lower test shell; 6. Lower eccentric conversion joint; 7. Sealing part; 71. Sealing pipe; 72. Sealing head; 8. Joint body; 9. Connecting hole; 10. Adapter hole; 11. Push-pull joint; 12. Upper pressure channel hole; 13. Upper setting pressure interface; 14. Lower pressure channel hole; 15. Lower setting pressure interface; 16. Installation hole; 17. Test seal interface. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other in any manner.

[0034] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5The figure shows an embodiment of the present invention, which discloses a test fixture for an eccentric packer. The fixture includes a vertically arranged packer setting casing 1, in which the packer can be sealed and installed. A cylindrical upper test shell 2 is coaxially arranged at the top of the packer setting casing 1. The top of the packer setting casing 1 is inserted into the bottom of the upper test shell 2 and is threadedly connected to the upper test shell 2.

[0035] In one embodiment, Figure 1 、 Figure 2 、 Figure 3 As shown, the top of the upper test shell 2 is coaxially connected to a central tube 3. The bottom of central tube 3 extends into the upper test shell 2 and serves as a pressure pipe. At the same time, the bottom of central tube 3 is coaxially connected to an upper eccentric adapter 4, and the bottom of upper eccentric adapter 4 is used to eccentrically connect to the oil pipe at the top of the packer.

[0036] In one embodiment, Figure 1 Figure 2 、 Figure 3 As shown, a lower test shell 5 is coaxially disposed at the bottom of the packer setting casing 1. The bottom of the packer setting casing 1 is inserted into the top of the lower test shell 5 and threadedly connected to the lower test shell 5. Furthermore, a lower eccentric transition joint 6 is disposed within the packer setting casing 1. The top of the lower eccentric transition joint 6 is eccentrically connected to the oil tubing at the bottom of the packer, and the bottom is coaxially connected to a plugging portion 7.

[0037] The test fixture for the eccentric type packer in this embodiment eccentrically connects the packer to the remaining components through the upper eccentric conversion joint 4 and the lower eccentric conversion joint 6, thereby realizing an overall concentric design of the test fixture and the packer. That is, except for the packer, the remaining components are almost concentrically designed, which effectively improves the problem of center of gravity offset and improves test safety.

[0038] In one embodiment, Figure 1 、 Figure 4 As shown, the upper eccentric transition joint 4 and the lower eccentric transition joint 6 respectively include a joint body 8, a connecting hole 9, and an adapter hole 10. The connecting hole 9 and the adapter hole 10 are located on different sides of the joint body 8, and the connecting hole 9 is connected to the corresponding adapter hole 10. The connecting hole 9 is coaxially arranged with the joint body 8 and is used to coaxially connect with the base pipe 3 or the plugging part 7. The adapter hole 10 is eccentrically arranged with the joint body 8 and is used to eccentrically connect with the corresponding oil pipe of the packer.

[0039] In one embodiment, Figure 1 、 Figure 4 As shown, the connecting hole 9 and the adapter hole 10 are respectively set as threaded holes, and the central pipe 3 and the sealing part 7 are respectively threadedly connected to the corresponding connecting hole 9, and the two oil pipes of the packer are respectively threadedly connected to the corresponding adapter holes 10 to improve the strength of the connection structure and the sealing effect.

[0040] In one embodiment, Figure 1 、 Figure 2 As shown, the central tube 3 includes an upper branch tube 31, a connecting tube 32 and a lower branch tube 33 which are coaxially connected from top to bottom. The bottom of the upper branch tube 31, the connecting tube 32 and the lower branch tube 33 are respectively located in the upper test shell 2. The upper branch tube 31 is connected to the upper test shell 2 through an upper sealing joint, and the lower branch tube 33 is threadedly connected to the connecting hole 9 of the upper eccentric conversion joint 4.

[0041] In one embodiment, Figure 1 、 Figure 5 As shown, the top of the upper branch pipe 31 is connected to a push-pull joint 11, and the push-pull joint 11 is used to connect to an external drawing machine. At the same time, the bottom of the push-pull joint 11 is provided with an upper pressure channel hole 12 connected to the upper branch pipe 31, and the push-pull joint 11 is provided with an upper sealing pressure interface 13 connected to the upper pressure channel hole 12, which can be connected to an injection pressure joint to construct an upper pressure channel. The staff can realize the sealing action of the packer through injection pressure.

[0042] In this embodiment, the push-pull joint 11 is configured as a hinge joint structure and is used to be hingedly fixed to an external pulling machine for testing the sealing and unsealing effects of the eccentric packer under stress.

[0043] In one embodiment, Figure 1 、 Figure 3 As shown, the sealing part 7 includes a sealing tube 71 and a sealing head 72. The top of the sealing tube 71 extends into the sealing casing 1 of the packer and is threadedly connected to the connecting hole 9 of the lower eccentric conversion joint 6. The sealing tube 71 is connected to the lower test shell 5 through the lower sealing joint, and the sealing head 72 is threadedly connected to the bottom of the sealing tube 71.

[0044] In one embodiment, Figure 1 、 Figure 3 As shown, the top of the sealing head is provided with a lower pressure channel hole 14 connected to the plugging tube 71. Furthermore, the plugging head 72 is provided with a lower setting pressure port 15 connected to the lower pressure channel hole 14, thereby forming a lower pressure channel. This design is similar to that of the upper pressure channel. In other words, the packer can be set and pressure-pressurized either through the upper setting pressure port 13 or the lower setting pressure port 15, providing more options.

[0045] In one embodiment, Figure 1 、 Figure 2 、 Figure 3 As shown, the upper test enclosure 2 and the lower test enclosure 5 are respectively provided with mounting holes 16 , and the two mounting holes 16 are respectively used to install temperature monitoring sensors to achieve temperature monitoring.

[0046] In one embodiment, Figure 1 、 Figure 2 、 Figure 3 As shown, when the components are connected, an upper sealing ring cavity is formed between the upper sealing shell 2, the upper sealing joint, the central tube 3 and the packer, and a lower sealing ring cavity is formed between the lower sealing shell 5, the sealing part 7 and the packer, and sealing interfaces 17 are respectively provided on the upper sealing shell 2 and the lower sealing shell 5 to enable the staff to perform injection pressure sealing operations.

[0047] From the above, it can be seen that the eccentric packer test tooling realizes the concentric design of the overall tooling through two eccentric conversion joints, and can realize temperature monitoring of the sealing end, tensile and compression testing of the eccentric packer, and pull-out and unsealing testing of the packer. The overall structure is simple, easy to disassemble and assemble, and safer and more efficient to transport and place. It improves the problem of center of gravity offset of the test tooling caused by the eccentric packer, improves the portability and safety of the test, and can also improve the test efficiency.

[0048] It should be noted that, unless otherwise specified, the technical or scientific terms used in the present invention should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0049] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present invention, "plurality" means more than two, unless otherwise specifically defined.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A test tool for an eccentric packer, characterized in that: include: A packer setting casing (1) for sealingly installing the packer therein; An upper test casing (2) is coaxially connected to the top of the packer setting casing (1); A central tube (3) is coaxially connected to the top of the upper test enclosure (2), and the bottom of the central tube (3) extends into the upper test enclosure (2); An upper eccentric conversion joint (4), one end of which is coaxially connected to the central pipe (3) and the other end of which is eccentrically connected to the oil pipe at the top of the packer; A lower test casing (5) is coaxially connected to the bottom of the packer setting casing (1); A sealing portion (7) coaxially connected to the bottom of the lower sealing shell (5); A lower eccentric conversion joint (6) has one end coaxially connected to the blocking portion (7) and the other end eccentrically connected to the oil pipe at the bottom of the packer.

2. The testing tool for the eccentric packer according to claim 1, characterized in that: The upper eccentric conversion joint (4) and the lower eccentric conversion joint (6) respectively include a joint body (8), a connecting hole (9) and an adapter hole (10), and the connecting hole (9) is communicated with the corresponding adapter hole (10). The connecting hole (9) is coaxially arranged with the joint body (8) and is used to be coaxially connected to the central pipe (3) or the sealing part (7). The adapter hole (10) is eccentrically arranged with the joint body (8) and is used to be eccentrically connected to the corresponding oil pipe of the packer.

3. The testing tool for the eccentric packer according to claim 2, characterized in that: The connecting hole (9) and the adapter hole (10) are respectively configured as threaded holes and are threadedly connected to corresponding components.

4. The testing tool for the eccentric packer according to claim 1, characterized in that: The central tube (3) comprises an upper branch tube (31), a connecting tube (32) and a lower branch tube (33) which are coaxially connected in sequence from top to bottom. The bottom of the upper branch tube (31), the connecting tube (32) and the lower branch tube (33) are respectively located in the upper test shell (2). The upper branch tube (31) is connected to the upper test shell (2) via an upper sealing joint, and the lower branch tube (33) is connected to the upper eccentric conversion joint (4).

5. The testing tool for the eccentric packer according to claim 4, characterized in that: The top of the upper branch pipe (31) is connected to a push-pull joint (11), the bottom of the push-pull joint (11) is provided with an upper pressure channel hole (12) connected to the upper branch pipe (31), and the push-pull joint (11) is provided with an upper sealing pressure interface (13) connected to the upper pressure channel hole (12).

6. The testing tool for the eccentric packer according to claim 5, characterized in that: The push-pull joint (11) is configured as a hinge joint structure and is used for hinged fixation with an external drawing machine.

7. The testing tool for the eccentric packer according to claim 1, characterized in that: The plugging portion (7) comprises a plugging pipe (71) and a plugging head (72); the top of the plugging pipe (71) extends into the packer setting casing (1) and is connected to the lower eccentric conversion joint (6); the plugging pipe (71) is connected to the lower test shell (5) via a lower sealing joint, and the plugging head (72) is connected to the bottom of the plugging pipe (71).

8. The testing tool for the eccentric packer according to claim 7, characterized in that: The top of the sealing head is provided with a lower pressure channel hole (14) connected to the sealing tube (71), and the sealing head (72) is provided with a lower sealing pressure interface (15) connected to the lower pressure channel hole (14).

9. The testing tool for the eccentric packer according to claim 1, characterized in that: The upper test enclosure (2) and the lower test enclosure (5) are respectively provided with mounting holes (16), and the two mounting holes (16) are respectively used for mounting temperature monitoring sensors.

10. The testing tool for the eccentric packer according to claim 1, characterized in that: The upper inspection sealing shell (2) and the lower inspection sealing shell (5) are respectively provided with inspection sealing interfaces (17).

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